Android Application Security Essentials

218 Pages·2013·4.21 MB·English

by  Pragati Ogal Rai

Android Application Security
Essentials
Write secure Android applications using the most
up-to-date techniques and concepts
Pragati Ogal Rai
BIRMINGHAM - MUMBAI
Android Application Security Essentials
Copyright © 2013 Packt Publishing
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First published: August 2013
Production Reference: 1140813
Published by Packt Publishing Ltd.
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Birmingham B3 2PB, UK.
ISBN 978-1-84951-560-3
www.packtpub.com
Cover Image by Karl Moore ([e-mail])
Credits
Author Proofreader
Pragati Ogal Rai Maria Gould
Reviewer Indexer
Alessandro Parisi Priya Subramani
Acquisition Editor Graphics
Martin Bell Abhinash Sahu
Ronak Druv
Lead Technical Editor
Madhuja Chaudhari
Production Coordinator
Prachali Bhiwandkar
Technical Editors
Sampreshita Maheshwari
Cover Work
Larissa Pinto Prachali Bhiwandkar
Project Coordinator
Hardik Patel

Foreword
When I first began working at GO Corporation in the early 1990s, the state of the art
in mobile computing was an 8-lb, clipboard sized device with minimal battery life
and an optional 9600 baud modem. But the vision that drove that device could just
as easily be applied to the newest Android and iOS devices released this year: the
desire for an integrated, task-centric computing platform with seamless connectivity.
Back then, we thought that the height of that vision would be the ability to "send
someone a fax from the beach." By the time I helped AOL deliver AIM, its instant
messaging client, as one of the launch titles for Apple's iPhone App Store in 2008,
that vision was already on its way to becoming a reality. But even at that time, just
a few years ago, we couldn't have predicted what a tremendous effect these devices
and the app ecosystem they spawned would have on our day-to-day lives.
Today, mobile devices are everywhere. They entertain us, they help us pass the time;
and of course, they help us keep in touch (though perhaps not so much through fax).
The Android operating system by Google is one of the driving forces behind this
revolution, having been adopted by hundreds of device vendors and installed on
nearly a billion devices worldwide. But as these mobile devices pervade every corner
of our lives, keeping them—and their users—secure becomes critical. That's why this
book is so important.
Viruses, Trojan horses, and malware may still be more prevalent on desktop platforms
than they are on mobile. But the growth of the mobile market has meant a sharp rise in
malicious software; anti-virus maker Kaspersky reports thousands of new programs
detected each month. And today's smartphones and tablets represent an irresistible
honey pot to the would-be attacker. Personal information, financial data, passwords,
and social graphs, even up to the moment location data—everything that makes these
devices so valuable to consumers is also what makes them such an attractive target to
pranksters and data thieves. As developers, it's our responsibility to be good stewards
of the information our users have entrusted to us. And the open and integrated nature
of the Android operating system means it's much more important that each of us do
our part to secure our applications and services.
Security can't be just a checkbox or an afterthought; it needs to be part of the design,
and woven throughout the implementation of your application. I know Pragati Rai
understands this intimately, having worked on this problem from both the perspective
of the OS and the application developer. That's why she's so well positioned to write
this book. She is able to look at the entirety of the Android ecosystem, from device to
kernel to application, and present clear and actionable steps developers can take to
secure their applications and data, along with source code that illustrates their use and
methodologies to test their effectiveness. Moreover, she goes beyond the bits and bytes
to explore security policy and best practices that can balance a developer's desire to use
personal information with the user's desire to protect it.
The convergence of powerful mobile devices, ubiquitous social media, and the ability
to transmit, store, and consume vast quantities of data has raised the stakes for
everyone when it comes to mobile security. But security is like the air we breathe; we
don't really think about it until it's gone, and by then it's often too late—too late to
protect our users, and too late to protect the developer's reputation and business. So,
it's critically important for every Android developer to understand the role they play
in keeping users safe in this complex and ever-changing landscape.
As a developer and a user myself, I'm thankful that Pragati has taken the time to
write such a comprehensive and informative guide to help us navigate this space,
and I'm hopeful that her lessons will enable Android developers everywhere to
give us the engaging and innovative applications we crave, while maintaining the
security and trust we expect and deserve.
Edwin Aoki
Technology Fellow, PayPal
About the Author
Pragati Ogal Rai is a technologist with more than 14 years of experience in mobile
operating systems, mobile security, mobile payments, and mobile commerce. From
working as a platform security engineer with Motorola Mobility, to designing and
developing PayPal's mobile offerings, she has an extensive end-to-end experience in
all aspects of mobile technology.
Pragati has a dual Master's in Computer Science and has taught and trained
computer science students at different levels. She is a recognized speaker at
international technology events.
My sincere thanks to the entire Packt Publishing team for bringing
this book to life. Special thanks to Hardik Patel, Madhuja Chaudhari,
and Martin Bell for working diligently with me throughout the
writing of this book and accommodating my crazy schedule. I want
to acknowledge Alessandro Parisi for his candid comments and
suggestions to improve the quality of the book.

Thanks to the thriving and vibrant community of Android
developers who are the reason behind this book.

A big thank you to all my friends and family for encouraging me
to write this book. In particular, I want to thank two families, the
Khannas and the Kollis, who were my pillars of support during
the writing of this book. Special thanks to Selina Garrison for her
guidance and for being there for me. Last but most importantly, I
want to thank my husband, Hariom Rai, and my son, Arnav Rai,
who constantly encouraged, supported, and cheered me in their
own ways as I wrote this book. Without them this book could not
have been completed.
About the Reviewer
Alessandro Parisi is an enterprise software architect and an ethical hacker,
working as an IT consultant for nearly 20 years now, keen on experimenting
non-conventional solutions to problem solving in complex and dynamic contexts,
mixing new technologies with lateral thinking and a holistic approach.
Founder of InformaticaSicura.com, specializing in IT security consultancy, he is
the curator of Hacking Wisdom column appearing on the blog informaticasicura.
altervista.org.
He is also the author of Sicurezza Informatica e Tutela della Privacy, published by
Istituto Poligrafico e Zecca dello Stato, Italy, 2006.
I would like to acknowledge Ilaria Sinisi for her support and
patience. Thank you very much, Ilaria.
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